I feel sorry for Peng, because she's an enormously talented girl who's progress is being hindered by the meddling of Chinese authorities.
As for Pat Cash, he has a loud and annoying motor mouth that never fails to reveal how much of a fool he is, but this is the only time I'll ever agree with his assessments. Culturally, the Chinese are more strict and because of that have higher expectations than Westerners. I guess their idea is that if they train you hard, the results will automatically follow. Logically, it should always work out like that, except it doesn't and the dominance of the U.S. in the Olympic Games is testimony to that. Even when the U.S.S.R. was competing (and it's also known for similarly brutal training methods), the U.S. usually came out on top.
What non-Chinese have to understand is that patriotism and national pride is so important because it's a very effective political tool. Without patriotism from the public, it'll be almost impossible for the Chinese Communist Party to administer control. And there's no better way to spice up patriotic fervor than sporting success.